Maintenance matters. You can also apply a layer of mulch to aid water retention. Its leaves add fall interest when they transform to lush shades of mahogany and purple. Plant hydrangea where the shrub is exposed to morning sunlight and afternoon shade, especially in warmer climates within zone 7. • Mulch 1-2″ deep around plant, avoiding area closest to stem. It is hardy through zone 4b/5a. Learn more about how to grow hydrangeas in pots. Limelight hydrangea tree. Mulch will also help keep weeds away. Blooming on both old and new growth,. See this plant in the following landscapes:Many experts suggest that the best time to plant a hydrangea is in the fall. Water low and deep with about one inch of water per week. WATERING: It is important to keep the soil mix evenly moist. Hydranthea. Prune Snowball Hydrangea in Late Winter. Bred in Georgia to handle the heat, compact Hydrangea paniculata Little Hottie® puts on an impressive and outsize flower show even as the mercury rises. hydrant: [noun] a discharge pipe with a valve and spout at which water may be drawn from a water main (as for fighting fires) — called also#R##N# fireplug. Plant Size: 4-5 feet. Specifically, hydrangeas prefer bright, indirect sunlight for several hours daily. There is only one generation of insects per year, but it is important to get them under control because they suck the sap out of the plant and weaken it. Planting in infertile soil can be detrimental to the growth of your hydrangeas. Firm the soil in around the rootball. Wrap up warm. ‘The rounded shrub has spotted, variegated leaves and produces bright red berries in fall,’ explains Fiona. To make your Hydrangeas blue, you first need to test your soil to determine the pH level. Despite the common name “French Hydrangea,” this species is native to Japan. It is compact and dwarf in habit, and the flowers cover every inch of the plant right down to the ground. Flower Color:White/ Green. Dreamin' is a genuinely unique hydrangea macrophylla. Make sure the pot has drainage holes and has room for the plant to grow. Hydrangea Fertilizer for Proper Hydrangea Care and Feeding. (30 cm), packed with creamy-white florets. Adding early. 0 works well. ) of organic compost before planting to enrich the. Nikko blue hydrangeas grow to be around 6 feet tall, with a similar spread. Not enough water, soil draining too quickly without retaining moisture, tree roots that compete with the hydrangea for water/ intercept rainfall, too much. For blue blooms, the soil needs to be acidic, with a pH level at or below 5. Like most potted plants, watering will depend on how fast the soil dries out and if it's in bloom or not. Its large bloom clusters open pure white, but then quickly age to deep pink, adding beauty to the shaded garden. Remove the plant from its container, and set it in the center of the hole. How to prune mophead and lacecap hydrangeas. It bears clusters of white flowers in summer that fade to shades of rose or green before turning beige in winter. Hydrangea. Hydrangea varieties. Many have attractive autumn colour and leaf shape. Though flowering bushes in bright shades of pink, blue, and purple are most common, newly introduced varieties offer a wider range of color and. (Image credit: Shutterstock) If you’re protecting hydrangeas which bloom on old wood and you live in a particularly chilly region (below 0 degrees Fahrenheit), then covering. hydrangea. Masses of fragrant white flowers held in flattened clusters, up to 8 in. 5 will tend to result in blue hydrangea blooms, while above 6. Planting the hydrangea tree properly is the key to its success. These hydrangeas are the 4- to 5-foot high and wide plants with large white, blue or pink flowers that are often used as hedges to line driveways and fences, or as. Water once the top few inches of soil are dry. Panicle hydrangeas are easy to propagate, most easily from cuttings or by layering rather than from seed. Propagation by cuttings is the main way of reproducing these plants. across (22 cm), densely packed with white, flushed pink florets. Buy Plants. In early summer, this small, bushy deciduous shrub produces huge, rounded flower clusters, up to 12 in. It should be deep enough so that where the plant meets the soil is flush to the ground. Smooth hydrangea can be grown in full sun or dappled shade (the. Dig a hole two to three times as wide as the pot but at the same depth. Compact size fits easily into any landscape. To change your hydrangea's color to blue, add half a cup of garden sulfur to the soil. Instead, they grow in a loose, spreading mass of fibers often referred to as a root ball. Snowball hydrangea blooms on the current season’s growth, also called new wood. Once the germinated seeds are big enough to handle, transplant them to their spot outside in the fall. If you live in the south, give the plant some shade in the hot afternoon hours. Remove the plant from its pot and. Growing Zones: 4-8. Grows up to 36-48 in. You may need to water slightly more, and more frequently. Thereafter, cut back to one feeding per month. Hydrangea arborescens. Quick Fire hydrangea is an eye catching shrub with several outstanding features. The name hydrangea is derived from Greek and Latin and taken to mean water vessel, in reference to the "cup-like form of the seed-capsule. The flowers have vivid colors that range from deep pink to periwinkle blue, depending on soil acidity. Hydrangeas need about one inch of water per week. The 'Strawberry Sundae' hydrangea's compact size makes it a perfect fit for smaller outdoor spaces in USDA Zones 3-8. Wrap chicken wire around the stakes to form a cage. Endless Summer® Hydrangea Shrub. Dig a hole twice as deep and as wide as the pot so the plant has enough room to grow. Flowers can be used in fresh or dried arrangements. Next, carefully strip off most of the leaves, leaving a pair at the tip of the cutting. Hydrangea is a species of hardy flowering perennial shrub with large domed or flattened flower clusters. It includes over 70 species of deciduous and evergreen shrubs, as well as a few small. Place your hydrangea in the pot, fill in with soil around it, and water well. This is a wonderful dwarf form of the popular Quick Fire™ hydrangea. Not too long ago, Hydrangea serrata was Hydrangea macrophylla subsp. "Incorrectly adjusting the soil pH can. These levels are affected by soil pH, so on acid soils where the pH is 5. Add soil around the root system and tamp it down as you go. Aside from loving the sun, they are hardy in zones 4-8, which makes this plant a great choice for a very large area of the United States. '. But garden centers typically carry named selections of the following five species: French (aka bigleaf) hydrangea (Hydrangea macrophylla), the most popular kind; smooth hydrangea (H. For pink flowers, the plants need neutral to alkaline soils (pH 6. Typically. Avoid these by spacing plants to allow for air circulation and avoid getting the leaves wet, especially late in the day. Incorrect Pruning. 5), pink or red in neutral to alkaline soils (pH 7. Pick Remaining Flowers. 9m tall. Here are 15 suggestions for hydrangea companion plants across a wide range of hardiness zones. There are two ways that hydrangeas bloom: new wood, and old wood. Daylilies grow quickly and come back year after year, just like. Native. The plant blooms best in full sun, at least 6 hours. On soils with a higher pH. Planting hydrangeas in pots: Use a bagged potting mix rather than garden soil. Annabelle is a favorite with bees and butterflies. Mature Size: Varies, 6-18 in. Wild hydrangea is a member of the Hydrangeaceae, the Hydrangea family. "Also, removing broken and damaged stems. To use the soap, stir together 2 parts hot water and 1 part glycerin in a vase. Next, carefully strip off most of the leaves, leaving a pair at the tip of the cutting. Hydrangea Varieties to Grow as Houseplants. 04 of 15. Apply the product around the base of the plant and work it into the soil with a rake or a cultivator. アジサイ属 （あじさいぞく、学名: Hydrangea ）は、 被子植物門 ミズキ目 の1属。. 1 million Instagram followers (below), and we took notice because they are amongst our favorite summer blooms to display in vases – they do tend to wilt quickly if not cared for properly. This fast-growing hydrangea suits propagation from cuttings —root or stem. Here are the main care requirements for taking care of hydrangea flowers: 1. 180 inches. Smooth hydrangea (Hydrangea arborescens), sometimes called hills of snow or snowball hydrangea, is an especially easy-growing type native to North America. Nikko Blue Hydrangea Care. 99. As an added bonus, they change. But pruning an old-wood hydrangea in spring will remove the existing buds, and it won’t flower that year. Panicle Hydrangea. Method 3. Dip the cutting in rooting hormone. Large and round, hydrangea flowers burst into rich pink, blue or purple shades beginning in summer, and hardy hydrangea shrubs can hold their blossoms well into fall. Hydrangeas in general prefer a rich, well-drained soil. This is an American variety and can withstand drought better than the Asian types. See this plant in the following landscapes:Spread: 4 to. Most of the 75 species of hydrangea plants are deciduous bushes that lose their foliage every. Avoid these by spacing plants to allow for air circulation and avoid getting the leaves wet, especially late in the day. Hydrangea anomala looks like a plant from a different family altogether, but is a member of the hydrangea family. Hydrangeas are some of the more beautiful garden shrubs, exhibiting big billowy blooms that come in various shades of pink, blue, purple, white and even green. From late spring to midsummer, it boasts large, magnificent, conical flower heads, up to 12 in. Hydrangea, Oakleaf Hydrangea. (60-120 cm). Only two of the few commonly grown species actually have the ability to change color. Move the plant into an unheated room with temperatures around 45. After you plant the hydrangea into the amended soil, be sure to add a thick layer of mulch. There are several types of white hydrangeas, each needing specific locations and care to perform best. Blue Enchantress®. Gently loosen the roots, then plant using plenty of rich soil. Zones 5-9. You may hang the cut bloom upside down or in a vase with just a few inches of water. The blooms are cone-shaped and can be single or double. Species in this family range from small to large shrubs to woody vines. 09 of 10. Annabelle hydrangea is propagated with softwood cuttings taken in spring. If pruning old-wood types at all, do so right after its buds begin to flower in summer. If the infestation persists, apply horticultural oil. Water at a rate of 1 inch per week throughout the growing season. FactoryTh/Getty Images. Prune Hydrangea macrophylla and Hydrangea serrata in mid-spring, others in early spring. Gatsby Gal. CamelliasYes! Hydrangea macrophylla, or bigleaf hydrangea, and to a certain extent H. Place the plant in the hole and backfill around the roots with soil. Oak leaves work well because they do not settle as easily as other. The thin strappy leaves of ornamental grasses make them appealing companion plants for hydrangeas. Choose a location that gets sun in the morning but has some shade during the heat of the afternoon. Like the mondo grass, it holds its golden color all season long and enjoys the same growing conditions as the hydrangea. Dig a hole that is two to three times as wide as the pot but the same depth. Read on for more oakleaf hydrangea information and tips on how to care for. Fire Light ® - full-sized (6-8’ tall and wide), full mophead flowers turn red. Twist-n-Shout® Bigleaf Hydrangea: This is a lacecap variety that grows between 3 and 5 feet tall. ’. There are many species, hybrids, and cultivars of hydrangeas. Hydrangeas are one of the most popular landscape shrubs in the US. Roughly translated, it means water vessel—an accurate description of hydrangeas’ thirst for water. Strawberry Vanilla (Hydrangea paniculata 'Renhy'), the cultivar that is the most similar but larger than Strawberry Sundae. Reblooming Hydrangea (Hydrangea macrophylla × serrata) Hardy in zones 4-9. Water thoroughly at the base of the plant, let the water soak in, and water again. macrophylla varieties feature tiny lacelike flowers surrounded by larger blossoms – these are commonly known as lacecap hydrangeas. It's an upright, multi-stemmed shrub with a loose, open branching habit. While maintaining its short stature of 3-5’ tall and wide, it really packs a visual punch in the garden. Flare Hydrangea bloom on new wood, so trim as needed in the fall after the flowers fade. 5. Indoors, the same principle applies. One of the latest hydrangeas to bloom, Hydrangea paniculata 'Tardiva' features upright, sharply pointed, conical panicles with the bulk of their sterile flowers loosely packed near their base. Huge, football-shaped flowers open in an elegant celadon green that looks fresh and clean in summer's heat. Especially for the early afternoon when south facing gardens get full sun. ) are popular flowering shrubs in Maryland gardens that are easily recognizable by their big blue, pink or white flower heads. They are produced in such great quantities that they literally. In-ground Hydrangeas – Winter Protection. Pruning 3. Hydrangea trees tend to grow best when the leaves are receiving at least 6-8 hours of sunlight per day, ideally in the morning. After a few days, shake the bag to get the seeds. Dip in suitable cutting gel, place in a pot of propagating mix, and keep moist in a warm shady spot. Hills-of-Snow hydrangea (Hydrangea arborescens ‘Grandiflora’): Commonly used cultivar is admired for its large, clean, white flower clusters. For the first option, remove one third to one half of each shoot, cutting ¼ inch above a pair of leaf buds each time. Unlike other hydrangea types, the soil pH does not affect Limelight's bloom color. The cultivar ‘Limelight’ has most commonly been grown in its natural shrub form, growing to a mature size of 6-8 feet tall and wide. Hydrangea L. Soil. Look for the “broccoli,” Lorraine says. nitty gritty™ roses. Once you have cages and frames, you can re-use them every winter. Lacecap hydrangeas are a smaller group (belonging to the same species), which have more flattened flower heads, where the. Dig the planting hole twice as wide and to the same depth as the root-ball. Cut a 4 to 6-inch section of green stem off the end of a branch during a period of active growth. To promote fresh, new, vigorous growth on established plants, cut back hard in early spring. (Image credit: Getty Images) Aucuba japonica ‘crotonifolia’, also known as Japanese or spotted laurel, can grow in partial or full shade. Purple hydrangeas fall somewhere in the middle. Some still consider it to be a subspecies. Starting at $21. Hydrangea leaves are possibly turning brown and possibly foliage growth with few flowers. Proven Winners ® varieties include: Bobo ®, Fire Light ®, Fire Light Tidbit ® , ‘ Limelight', Limelight Prime ® , Little Lime ®, Little Lime Punch ™ , Pinky Winky ®, Quick Fire ®, Quick. [2] Common names include bigleaf hydrangea, French. Remove the plant from its nursery pot and place it in the container. You should carry out this practice all through the blooming season to encourage new blossoms and keep your plant looking fresh. Typically hydrangeas thrive when fed an all-purpose, balanced fertilizer like a 10-10-10 N-P-K or 12-4-8 N-P-K. Hydrangea serrata 'Hydrantea' is easy to grow and makes a lovely addition to ornamental borders. Oakleafs are native to the United States, unlike their famous cousins with pink and blue “mophead” flowers, and are tough, cold hardy, and drought resistant. Some form their flower buds on. Blooming from mid to late summer, the glowing blossoms retain their color for a long period before taking on a metallic. Perhaps the best known of the hydrangeas is the mophead style of Hydrangea macrophylla. Cut the stem, then let the flower head finish drying in the bag. Remove any infected leaves, including those that have fallen off the plant. As with other mophead or French hydrangea varieties, Summer Crush hydrangea require morning sun and afternoon shade. Bill Stites/EYESWEET INC. Held on sturdy, strong stems, the blossoms emerge creamy-white and age to a vivid raspberry pink as the season progresses. Choose a container that is just a little larger than the pot in which it came. The colorful flower petals are actually sepals, modified leaves, while the fertile flowers are much smaller and hidden inside. They prefer sun in the morning with. Reapply annually. Bobo ® hydrangea is engulfed by large white flowers in summer. elenaleonova / Getty Images. A number of common ornamental shrubs are in the family including sweet mock orange ( Philadelphus coronarius) and panicle hydrangea ( H. The Royal. BOBO ®Panicle. Panicle hydrangea blooms on new wood; it accepts—and even prefers—fairly heavy pruning. Height: 3 feet. This plant is easy to change color and has beautiful sky-blue flowers with green centers. Dozens of species exist. Establish your potted hydrangea in a place that gets morning sun or sustained southern-facing sun for about four hours but keep the plant out of direct sunlight. - Powerful blooming ability, with dozens of full mophead flowers on strong stems. Use your finger to feel into the soil around the base of the plant and check for dryness. In this article, coastal gardening expert and hydrangea enthusiast Jill Drago outlines each step for planting, growing, and caring for smooth hydrangeas. It will grow only 3 to 4 feet wide and 4 to 5 feet tall, but what it lacks in size it makes up for in vibrant, showy blooms throughout the season. A south-facing window is ideal. The plant is a stellar. Reaching a mature height of 3 to 5 feet with a symmetrical spread of 3 to 5 feet, the flowers of this fragrant hydrangea. Hydrangeas are brilliant for bringing bursts of summer color to the garden, plus they make a lovely cut flower. Since garden hydrangeas are deciduous shrubs, they. Back fill in the sides with soil. Dark green foliage complements the massive round flowers held on sturdy stems above the leaves. Water them during a drought, especially if you notice wilting. Native to woodlands in the eastern United States, Hydrangea arborescens is well suited for massing or as an accent specimen in the garden. Hydrangea ( Hydrangea macrophylla ), sometimes called French hydrangea, is a large shrub with beautiful masses of color. Developed by the US National Arboretum from a cross of ‘Snow Queen’ and ‘Pee Wee’. Plant your climbing hydrangea in a low-lighted area but not overly shady. 2. Firstly, its unique ability to bloom on both old and new growth, giving it the ability to bloom consistently and provide gorgeous flowers all summer long as flower buds are. Dig up the rooted section from the ground. Then, remove any flowers or buds, as well as any leaves on the lower two-thirds of the stem. Dig a hole slightly bigger than the pot your hydrangea came in. Looking across a yard at a bank of hydrangea bushes in full bloom is certainly. Hydrangea L. Be sure to choose something that loves. When growing hydrangea as a houseplant, a period of dormancy during fall and winter is recommended. How to Get More Panicle Hydrangea Flowers: Plant panicle hydrangeas in all-day sun or afternoon sun. They enjoy more sun than the Mop-head Hydrangeas, so they are a good choice for a sunnier location. Climbing Hydrangea, Hydrangea. Hydrangea macrophylla basics. Hydrangea paniculata ‘Bombshell’ – This mounding shrub grows 2 to 3 feet high and bears white flowers with pink centers. Hydrangea anomala subsp. 5 pH, will favor blue flowers by allowing the hydrangea to absorb more aluminum. Feed the plant every week while the plant is blooming, using a water soluble fertilizer diluted to half strength. Hydretain has the unique ability to attract water molecules, create droplets, and then release those droplets to plant roots. Leave only the top two leaves and dip the cut end in a rooting hormone before sticking it in damp soil or another potting medium. Then place the hydrangea in. Use a high quality potting soil for best results. This could be a window ledge, or it could be outside on a porch or patio. Once the germinated seeds are big enough to handle, transplant them to their spot outside in the fall. Other types of hydrangea, including Hydrangea aspera and Hydrangea quercifolia, need only light pruning in spring. Incrediball hydrangea grows in full sun to partial shade, and the latter is preferable in hot climates. For true blue flowers, the hydrangeas need to be grown in acidic soil with a pH of 5. Dip in suitable cutting gel, place in a pot of propagating mix, and keep moist in a warm shady spot. Caring for this shrub is fairly easy. While the plant is in bloom, hydrangeas need water more often. Pink-white blooms of hydrangea 'Sundae Fraise'. 'By cutting stems to different heights, you’ll get flowerheads produced at different levels,' advises Sarah Raven. Within those categories of hydrangea. A. Chances are that the plant you received is of the cultivated deciduous shrub variant. Dig a hole as deep as the root ball and 2-3 times as wide. If your chosen hydrangea is a variety with large leaves, you can also trim the remaining two. The hybridizers were successful and ended up with a plant with very strong stems that will support their flowers and remain upright. Water. To propagate softwood cuttings, follow these steps (as long as it's not a trademarked cultivar): Take a 5-inch stem cutting and remove the lower leaves. This spot should also be large enough for the full size of the plant. This can give you an idea of the space you need to allocate in your garden to. Hydrangea paniculata or the panicle hydrangea is the sunseeker of the hydrangea family. Bigleaf is divided into two flower types – lacecap and mophead. You want to cut down to just above the fresh. Add plenty of finished compost and organic matter to the soil to enrich and lighten it. If you wish to fertilize, an application of a rose fertilizer in early spring, once the soil has thawed, is sufficient. Annabelle (Hydrangea aborescens ‘Annabelle’) is classified as a smooth type which produces huge white blooms that are 8-12 inches in diameter. Mulch to conserve moisture and buffer soil temperatures. Backfill the hole, and cover the branch with garden soil. Where to grow hydrangeas (Image credit: Leigh Clapp) Hydrangeas grow best in well-drained soil, in a protected, dappled shady spot. Trimming your hydrangea at the wrong time of year can also cause a lack of flowers. Cut branch from the mother plant. Zones: 3-8 Height: 6-8’ 5. Ralph Lee Anderson. Hydrangea paniculata 'Limelight' grows 6 to 8 feet tall and 5 to 7 feet wide and has a greenish color in its flowers. Incorrect pH. ‘Another very popular companion plant is Japanese forest grass. While it can seem tedious, protecting your potted hydrangeas against the winter winds, cold, and frost. Keep your eye on it and, as the flower dies, put a paper bag over it. Mature height is just one to two feet, with no pruning necessary. Low plants can look great as hydrangea plant companions. Hydrangea macrophylla is a species of flowering plant in the family Hydrangeaceae, native to Japan. Soil with a pH under about 5. Several. Name: Cityline Mars hydrangea ( Hydrangea macrophylla Cityline 'Mars') USDA Hardiness Zones: 5-9. Opening creamy white with some lime green flushing in midsummer, the florets turn soft to deep pink as fall approaches. 2. Hydrangeas grow best in climates with moderate humidity and temperatures—typically around 50°F to 60°F—under 80°F is best. 99. Few blooms provide more showy appeal than hydrangea: long-blooming. Hydrangeas thrive in well-draining, organically rich soil, so dig in additional compost and cow manure at planting. Also known as peegee hydrangea. Buy Online. Plant in well-draining soil with plenty of organic matter. Some types grow significantly larger than others. How to Deadhead Bigleaf and Oakleaf Hydrangeas. macrophylla but is generally smaller, with a height and spread of 2-4 feet. But pruning an old-wood hydrangea in spring will remove the existing buds, and it won’t flower that year. STEP 1: Cut the shoots back by a third to a half. ’ 8. 3. Add perlite if the mix feels too thick and heavy. Oakleaf hydrangea (Hydrangea quercifolia) is a flowering deciduous shrub with large clusters of flowers on sturdy stems and distinctive leaves with lobes like those of an oak tree (quercifolia means "oakleaf" in Latin). The cultivar name is ‘Abetwo . Noted for its distinct, boldly lobed leaves and very showy blooms, award-winner Hydrangea quercifolia ‘Snow Queen’ (Oak Leaf Hydrangea) is a deciduous shrub that provides a long season of interest. Choose a planting location that receives at least three to six hours of sunlight each day. Continue to 5 of 14 below. long (20-30 cm), from late summer into fall. Snip six- to eight-inch softwood cuttings in late spring or early summer, preferably from a stem that didn’t flower. The most prevalent causes of. Make sure the plant will have partial shade. All hydrangea plants need irrigation in the summer, especially if they are planted in a full sun location. The blue flower colour only develops if planted in acid soil. by series. Fungal leaf spots and powdery mildew are among the most common hydrangea diseases. Pinky Winky ® H. Paniculatas dependably bloom on new growth every year in mid-summer, and the show is spectacular. The occurrence of these toxins throughout the genus is poorly known, so other species of Hydrangea should be treated with caution and not consumed. 3. 2. Water the area thoroughly. アジサイ（紫陽花）. This beautiful dwarf version of the popular hydrangea ‘Limelight’ is a great low-maintenance addition to any garden. Flare™ Hydrangea will grow 2 to 3 feet tall and wide. Held on thick stems, the blossoms emerge creamy-white and develop bright pink and red tones as the season progresses. Watering from overhead can increase the fungal spread. Another is to turn on your hose to a slow trickle. sun requirements Partial Sun to Partial Shade. It should be deep enough so that where the plant meets the soil is flush to the ground. How to Get More Panicle Hydrangea Flowers: Plant panicle hydrangeas in all-day sun or afternoon sun. 5, which is ideal for overall nutrient absorption. They fill gardens with their green, leafy foliage and incredible blooms during the warm months. Long used as a common name for the plant, the name 'hortensia' also indicates a specific selection of bigleaf hydrangea, which goes by the scientific name Hydrangea macrophylla 'Hortensia. macrophylla flowers on either old or new wood, depending on the cultivar, and are highly sensitive to the pH of the soil. Light: Partial sun to shade. 5 pH, or “sweet. 1. Ailing hydrangea symptoms often start at the leaves, even if the affecting disease is root or insect based. Leave 1 to 2 inches between the top of the soil and the rim of the pot for watering. Several species are grown in greenhouses and gardens for their showy, usually ball-like flower clusters. Its flattened clusters of 2- to 6-inch wide greenish white flowers appear from late spring through summer. ’ 8. These shrubs are native to the cooler regions of Asia. Whereas soils that are above 6. Blue-flowered florists' plants may show pink. The water should be evenly distributed at the roots, and never over the top of the plant. Plants reach 3 to 4 feet high. Indirect sunlight for. If you want to attempt propagating hydrangeas in water, the steps are the same up until dipping the stem into rooting powder. 5 pH, will favor blue flowers by allowing the hydrangea to absorb more aluminum. 144 inches. Every hydrangea is different. It has strong branches and big flower heads. Each stem should be trimmed back to the nearest set of healthy buds, making each cut so that it slants away. Easy-to-grow, reliable panicle hydrangea with huge, full flower heads on sturdy, strong stem. Considered one of the best lacecaps, Hydrangea macrophylla 'Lanarth White' shows off large clusters of white florets faintly brushed with blue or pink. 3. It yields white flowers and has excellent frost and heat tolerance. 10.